Database Keys Multiple Choice Questions (MCQ) PDF Download

MCQ 1: A set of one or more attributes that collectively, allow us to identify uniquely a tuple in the relation, is known as

1. Unique key
2. Special key
3. Super key
4. Primary key

MCQ 2: No two tuples in a relation are allowed to have exactly the same value for

1. Some attributes
2. All attributes
3. Some tuple
4. All tuples

MCQ 3: Specifying tuples within a given relation, are expressed in terms of the

1. Attributes
2. Variables
3. Function
4. Domain

MCQ 4: A superkey may contain extraneous

1. Attributes
2. Keys
3. Instances
4. Entries

MCQ 5: The values of the attribute values of a tuple must be such that they can uniquely identify the

1. Instance
2. Entity
3. Relation
4. Tuple